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Exrates is a crypto exchange that was founded in 2016 which makes it an older crypto exchange. There is not much information about the founders but the site reveals that it is registered in Estonia under a company named DexTechnologies OU.
Coinchange is a cryptocurrency trading service registered in Canada. The platform brands itself as a smart bridge to cryptocurrencies and DeFi investments. Coinchange strives to be a regulated company providing users with a state-of-art security trading environment. KYC procedure on Coinchange is obligatory. The exchange is special because of zero trading fees. 
TOKOK is a centralized digital cryptocurrency exchange providing USD, BTC and ETH markets for trading.